DORCHESTER — The Animal Rescue League of Boston has urged residents of Dorchester to keep their pets away from Bakersfield Street – the site where dozens of birds became mysteriously ill on Thursday.

Residents noted the grackles – a form of black bird – falling from trees and lying in the street Thursday afternoon.

The Boston Globe reports that the grackle death toll has now reached 32 – twelve of which were dead by the time authorities arrived, eight of which died en route to an animal shelter, and twelve of which had to be put down due to their poor health.

Additionally, a resident's cat became sick and had to euthanized.

In total, 47 birds became ill on Thursday and another was found on Friday.

Authorities are taking a number of steps to understand what occurred – including investigating the neighborhood and carrying out a bird survey.

Tests were conducted on the sick birds, but the results have not yet come back, said Lisa Timberlake, a spokeswoman for the Inspectional Services Department.

The incident does not pose a "public health threat," according to a spokesperson from the Boston Public Health Commission.